JP3614101B2 - Vehicle seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat, and in particular, a vehicle seat in which a seat cushion is lowered onto the vehicle floor in conjunction with the forward movement of the seat back so that the rear surface of the forward-backed seat back can be used as a luggage loading surface. It relates to the improvement of the structure.
[0002]
[Prior art]
An example of this type of vehicle seat is shown in FIG. A stay 1 (only one is shown) extending in parallel in the front-rear direction (left-right direction in the figure) is provided on the vehicle floor F, and the lower end of the link arm 2 in a standing posture is rotatably coupled to the front end of the stay 1. In addition, a seat back 4 in a standing posture is coupled to a rear end portion of the stay via a known reclining mechanism 3. The upper end of the link arm 2 is rotatably coupled to the side surface of the front end portion of the seat cushion 5. One end of a hinge arm 6 that is curved in a slightly open L shape is fixed to the side surface of the rear end portion of the seat cushion 5, and the other end of the hinge arm 6 is rotatably coupled to the side surface of the seat back 4. Yes.
[0003]
With such a structure, when the seat back 4 is tilted forward (leftward in the figure) about the rotation shaft 31 of the reclining mechanism 3, the seat cushion 5 moves forward accordingly, and the link arm 2 is erected. However, the seat cushion 5 as a whole is lowered onto the vehicle floor F by tilting forward to a horizontal posture as shown by a chain line in the figure centering on the lower end thereof. Then, the seat back 4 that is moved forward to the horizontal posture overlaps the lowered seat cushion 5.
[0004]
4 and 5 show the detailed structure of the seat cushion portion of the vehicle seat. The seat cushion 5 includes a frame body 51 and a cushion material 52 placed on the frame body 51. The frame body 51 includes a front frame 53, a rear frame 54, and left and right horizontal frames 55 (only one of them is shown) for connecting them. It is formed in a rectangle. The horizontal frame 55 is formed in an inwardly-shaped U-shaped cross section (FIG. 5), and the upper end of the link arm 2 is located outside the horizontal frame 55 and is rotatably coupled to the back surface thereof by the stepped bolt 21. ing. A bracket plate 7 (FIG. 4) is provided along the front half side surface of the horizontal frame 55, and the bracket plate 7 having a substantially U-shaped cross section facing downward has an inner wall 71 bent horizontally to form a horizontal frame. 55 is joined to the upper side wall. A skin 56 covering the cushion material 52 is locked to the lower end of the outer wall 72 of the bracket plate 7 by a J hook 57 provided on the lower edge thereof. One end of the hinge arm 6 is fixed to the side surface of the rear half of the horizontal frame 55 with a bolt 61.
[0005]
[Problems to be solved by the invention]
By the way, in the above conventional seat structure, it is necessary to prepare separate bracket plates 7 and hinge arms 6 and to join them to the horizontal frame 55 or to fix them with bolts, which increases the number of assembling steps and parts. was there.
[0006]
Therefore, the present invention solves such problems, and an object of the present invention is to provide a vehicle seat that realizes a significant cost reduction by reducing the number of parts and the number of assembly steps.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the first invention, a seat back (4) whose lower end is connected to the vehicle floor (F) via a reclining mechanism (3) and can be moved forward, and a link arm (2 ), The front end is connected to the vehicle floor (F), and the rear end is pivotally connected to the lower end of the seat back (4), and the seat back (4) The link arm (2) is moved forward in conjunction with the forward movement and the seat cushion (5) is lowered onto the vehicle floor (F), and the forward-backed seat back (4) is placed on the lowered seat cushion (5). ), The frame body (8) of the seat cushion (5) and the frame bodies (81A, 81B) extending on the both sides and extending in the front-rear direction are opened outward. The upper end with rotatably coupling of the link arm (2) on the back is molded into the surface, the frame (81A, 81B) after extending the lower opening edge of the downwardly to further inward It is made into the latching | locking part (85) which is made to bend and latches the skin (56) of a seat cushion (5) .
[0008]
In the first invention, a locking portion is formed on the open edge of the frame body, and the skin of the seat cushion is locked here, so there is no need to provide a separate bracket plate as in the prior art, The manufacturing and assembly work is reduced.
[0009]
In the second aspect of the invention, a hinge arm portion (84) that is pivotally connected to the lower end portion of the seat back (4) is integrally formed at the rear end of the frame (81A, 81B).
[0010]
In the second invention, since the hinge arm portion is formed integrally with the rear end of the frame body, it is not necessary to provide a separate hinge arm as in the prior art, and the labor of manufacture and assembly is reduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a frame body 8 of a seat cushion of a vehicle seat. In the figure, the frame body 8 is composed of horizontal frames 81A and 81B that extend in the left-right position in parallel in the front-rear direction, and a front frame 82 and a rear frame 83 that connect the front and rear ends of the horizontal frames 81A and 81B. And formed into a substantially rectangular shape in plan view. The front frame 82 is made of a linear round bar, while the rear frame 83 is made of a round bar having both ends bent. The horizontal frames 81A and 81B are formed by press-molding a long plate material, and the rear end portion is bent obliquely upward to form a hinge arm portion 84.
[0012]
Each of the horizontal frames 81A and 81B has a substantially U-shaped cross section that opens outward, and at its front end, as shown in FIG. 2, the open edge of the lower side wall 811 of the horizontal frame 81A extends downward at a substantially right angle. Then, it is further bent inward (leftward in FIG. 2) at a substantially right angle to form a locking portion 85. The locking portion 85 is formed with rectangular locking holes 851 at two locations on the front and rear sides. The left and right link arms 2 are connected to each other by pipe bodies 22 at the upper end inner surfaces, and the upper ends of the link arms 2 are located inside the horizontal frames 81A and 81B and are rotated to the rear surfaces of the horizontal frames 81A and 81B. It is combined freely.
[0013]
That is, a nut 23 is welded and fixed to the inner plate surface of the link arm 2 to which the pipe body 22 (FIG. 2) is joined, and the sliding bush from the outside in the mounting hole 812 provided in the standing wall of the horizontal frame 81A. A stepped bolt 814 is inserted through 813, and is screwed into the nut 23. On the other hand, the outer skin 56 covering the cushion material 52 placed on the frame body 8 has a lower edge that wraps around below the locking portion 85 of the horizontal frame 81A as shown in FIG. The wire 57 penetrating the leading edge 561 is caulked and held by a hog ring wire 58 passed through the locking hole 851.
[0014]
The lower end of the link arm 2 is rotatably coupled to the front end of the stay 1 provided on the vehicle floor F (see FIG. 3), as already described in the prior art, and the horizontal frame 81A, The front end of the hinge arm portion 84 formed integrally with the rear end portion of 81B is rotatably coupled to the side surface of the seat back 4 (see FIG. 3) by a sliding bush 841 (FIG. 1) and a stepped bolt 842. . Other sheet structures are the same as in the prior art.
[0015]
With such a structure, when the seat back 4 coupled to the stay 1 is moved forward through the reclining mechanism 3 (FIG. 3), the link arm 2 is moved forward accordingly and the seat cushion 5 is placed on the vehicle floor F. The seat back 4 is overlaid thereon, and the same effect as the conventional one can be obtained.
[0016]
In the present embodiment, the open edges of the horizontal frames 81A and 81B are extended downward to form the locking portion 85, and the lower edge of the skin 56 covering the cushion material 52 of the seat cushion 5 is locked here. There is no need to provide a separate bracket plate 7 (see FIG. 4) as in the prior art, and the labor of manufacturing and mounting is reduced. Furthermore, since the integrally molded hinge arm portion 84 lateral frame 81A, to 81B, the hinge arm 6 of the separate as in the conventional (see FIG. 4) it is not necessary to provide, it is also reduced labor of the manufacturing and mounting .
[0017]
【The invention's effect】
As described above, according to the vehicle seat of the present invention, significant cost reduction can be realized by reducing the number of parts and the number of assembly steps.
[Brief description of the drawings]
FIG. 1 is a perspective view of a frame body of a seat cushion, showing an embodiment of the present invention.
FIG. 2 is a partially enlarged cross-sectional view in which a cushion material is placed on a frame body, and the cross-sectional portion is taken along the line II-II in FIG.
FIG. 3 is an overall side view of a conventional vehicle seat.
FIG. 4 is a partial cross-sectional exploded perspective view of a seat cushion.
5 is a cross-sectional view taken along line IV-IV in FIG.
[Explanation of symbols]
2 ... Link arm, 3 ... Reclining mechanism, 4 ... Seat back, 5 ... Seat cushion, 56 ... Skin, 8 ... Frame body, 81A, 81B ... Horizontal frame, 84 ... Hinge arm portion, 85 ... Locking portion, F ... Vehicle floor.

Claims (2)

The seat back is connected to the vehicle floor via a reclining mechanism and can be moved forward, and the front end is connected to the vehicle floor by a standing link arm, and the rear end is rotatable to the lower end of the seat back. The link arm is moved forward in conjunction with the forward movement of the seat back, and the seat cushion is lowered onto the vehicle floor, and is also moved forward on the lowered seat cushion. In the vehicle seat in which the seat backs overlap, the frame body of the seat cushion, which is positioned on both sides and extends in the front-rear direction, is formed into a substantially U-shaped cross section that opens outward. the upper end of the link arm as well as pivotably coupled to the back, after which the lower opening edge of the frame was extended downwardly, Is bent inward to al, a vehicle seat is characterized in that a locking portion for locking the skin of the seat cushion. The vehicle seat according to claim 1, wherein a hinge arm portion that is rotatably connected to a lower end portion of the seat back is integrally formed at a rear end of the frame body.

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